CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper I.C. Handling Procedures.
Copyright
© Harris Corporation 1999
1
Semiconductor
DG181 thru DG191
High-Speed Drivers with JFET Switch
Description
The DG181 thru DG191 series of analog gates consist of 2
or 4 N-channel junction-type field-effect transistors (JFET)
designed to function as electronic switches. Level-shifting
drivers enable low-level inputs (0.8V to 2V) to control the
ON-OFF state of each switch. The driver is designed to
provide a turn-off speed which is faster than turn-on speed,
so that break-before-make action is achieved when
switching from one channel to another. In the ON state, each
switch conducts current equally well in both directions. In the
OFF condition, the switches will block voltages up to 20V
peak-to-peak. Switch-OFF input-output isolation 50dB at
10MHz, due to the low output impedance of the FET-gate
driving circuit.
Features
• Constant ON-Resistance for Signals to ±10V (DG182,
DG185, DG188, DG191), to ±7.5V (All Devices)
• ±15V Power Supplies
• <2nA Leakage from Signal Channel in Both ON and
OFF States
• TTL, DTL, RTL Direct Drive Compatibility
•t
ON
, t
OFF
<150ns, Break-Before-Make Action
• Cross-Talk and Open Switch Isolation >50dB at 10MHz
(75Ω Load)
April 1999
Functional Diagrams (Typical Channel)
DG186, DG187, DG188 - ONE AND TWO CHANNEL
SPDT AND SPST CIRCUIT CONFIGURATION
DG183, DG184, DG185 - TWO CHANNEL DPST
CIRCUIT CONFIGURATION
S
2
D
2
S
1
D
1
V+
GND
V
L
IN
V-
S
D
S
D
V+
GND
V
L
IN
V-
File Number 3114.4
OBSOLETE PRODUCT
POSSIBLE SUBSTITUTE PRODUCT
DG184, DG185: HI-5049, HI-5045
DG190: DG403, HI-5051, IH5151
DG191: HI-5043, HI-0390, IH5043
